381507993571 has 2 divisors, whose sum is σ = 381507993572. Its totient is φ = 381507993570.

The previous prime is 381507993553. The next prime is 381507993619. The reversal of 381507993571 is 175399705183.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 381507993571 - 2⁹ = 381507993059 is a prime.

It is not a weakly prime, because it can be changed into another prime (381507993551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190753996785 + 190753996786.

It is an arithmetic number, because the mean of its divisors is an integer number (190753996786).

Almost surely, 2^381507993571 is an apocalyptic number.

381507993571 is a deficient number, since it is larger than the sum of its proper divisors (1).

381507993571 is an equidigital number, since it uses as much as digits as its factorization.

381507993571 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7144200, while the sum is 58.

The spelling of 381507993571 in words is "three hundred eighty-one billion, five hundred seven million, nine hundred ninety-three thousand, five hundred seventy-one".